Question

A body starts from rest and attains a velocity of 54km/hr after covering a distance of 10m. Find the time taken
and acceleration of body.
​

Answer 1

Answer:

a= 11.25 m/s

t=1.33 sec

Explanation:

v=final velocity,u=initial velocity,a=acceleration,t=time ,

S=Displacement

u=0 because intially body was at rest

v=54*1000/3600

v=15 m/s

First we converted km/hr into m/s

Using 3rd equation of motion

v^2-u^2 =2as

15^2-0^2 =2a*10

225=20a

a=225÷20

a=11.25m/s

Using 1st equation of motion

V=u+at

15=0+11.25t

t=15/11.25

t=1.33 sec